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2f5df7add7
Problem:
The #has-parent? predicate indexes the result of node:parent() without
checking it, so a capture that matches a tree's root node raises
query.lua:600: attempt to index a nil value
instead of simply not matching. In a highlights query that breaks
highlighting for the whole buffer. The sibling #has-ancestor? predicate
handles the same situation.
Solution:
Treat a missing parent as "does not match".
AI-assisted